Nodejs Utililty Methods String Ends With

String.prototype.endsWith = function (str){
    return this.slice(-str.length) == str;
};
String.prototype.startsWith = function (str){
    return this.slice(0, str.length) == str;
};

String.prototype.endsWith = function (str) {
  return this.slice(this.length - str.length, this.length) === str;
};

String.prototype.endsWith = function(str) {
    if (str == this.substring(this.length - str.length, this.length)) return true;
    return false;

String.prototype.endsWith = function (string) {
  var index = arguments.length < 2 ? this.length : arguments[1];
  return this.indexOf(string) === index - string.length;
};

String.prototype.endsWith = function (string) {
  var index = arguments.length < 2 ? this.length : arguments[1];
  return this.indexOf(string) === index - string.length;
};

String.prototype.endsWith = function (string) {
  var index = arguments.length < 2 ? this.length : arguments[1];
  var foundIndex = this.indexOf(string);
  return foundIndex !== -1 && foundIndex === index - string.length;
};

String.prototype.endsWith = function (string) {
  var index = arguments.length < 2 ? this.length : arguments[1];
  var foundIndex = this.lastIndexOf(string);
  return foundIndex !== -1 && foundIndex === index - string.length;
};

String.prototype.endsWith = function(substr) {
  return (this.match(substr + "$") == substr);
};

String.prototype.endsWith = function (substring) {
    var stringCut = this.substring(this.length - substring.length);
    return stringCut === substring;

String.prototype.endsWith = function(substring) {
    var stringLength = this.length;
    var substringLength = substring.length;
    if (substringLength > stringLength) {
        return false;
    var i;
    for (i = 0; i < substringLength; i += 1) {
        if (substring[substringLength - i] !== this[stringLength - i]) {
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